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1.
Crit Care Med ; 29(1): 18-24, 2001 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-11176152

RESUMEN

OBJECTIVE: We undertook this study to understand the factors at our transplant center that contribute to patients' return to the ICU after their liver transplant and their initial discharge from that unit. Patients who, after liver transplantation, fail discharge from the Intensive Care Unit (ICU) and must be readmitted to that unit may well utilize many more resources than those patients who are well enough to stay out of the ICU. DESIGN: A retrospective review of a prospectively maintained liver transplant research database followed by a retrospective review of (a subgroup) patient charts and contemporaneous controls. SETTING: A large metropolitan tertiary care center and adult liver transplant center. PATIENTS: A total of 1,197 consecutive adult patients who underwent their initial liver transplantation from 1984 to 1996. INTERVENTION: Readmission to the intensive care unit after adult liver transplantation and discharge from that unit. MAIN RESULTS: Only recipient age, pretransplant synthetic function labs (protime and albumin), bilirubin levels, and intraoperative blood product requirements could be statistically linked to the group requiring ICU readmission. The primary etiology for ICU readmission was cardiopulmonary deterioration. Readmission was associated with significantly lower patient and graft survivals. A detailed review of 23 patients transplanted from October 1994 to June 1996 was made, with special emphasis on cardiopulmonary status (hemodynamics, respiratory variables, and chest radiograph findings). This subgroup was compared with 30 temporally matched controls who were not readmitted to the ICU. Intravascular fluid overload and lower inspiratory capacity were significant factors related to ICU readmission. Readmitted patients had a longer hospitalization with higher hospital charges than the control group. CONCLUSIONS: We conclude that the most important means of preventing ICU readmission in liver transplantation patients is to optimize cardiopulmonary function and status. Close monitoring of fluid balance to avoid hypervolemia is essential. Readmitted patients have a greater resource utilization and have lower survival rates.


Asunto(s)
Unidades de Cuidados Intensivos/estadística & datos numéricos , Trasplante de Hígado , Readmisión del Paciente/estadística & datos numéricos , Revisión de Utilización de Recursos , Adulto , Femenino , Hemodinámica , Precios de Hospital , Humanos , Tiempo de Internación , Funciones de Verosimilitud , Trasplante de Hígado/economía , Modelos Logísticos , Masculino , Persona de Mediana Edad , Complicaciones Posoperatorias , Mecánica Respiratoria , Estudios Retrospectivos , Factores de Riesgo , Estadísticas no Paramétricas , Texas
2.
Transplantation ; 66(10): 1300-6, 1998 Nov 27.
Artículo en Inglés | MEDLINE | ID: mdl-9846512

RESUMEN

BACKGROUND: The possibility of primary sclerosing cholangitis (PSC) recurrence after liver transplantation has been debated. The aim of this study is to examine whether recurrent PSC and chronic rejection (CR) are different expressions of the same disease process. METHODS: One hundred consecutive patients receiving 118 grafts for the diagnosis of PSC were reviewed and placed into three groups: group A, recurrent disease, as evidenced by cholangiographic and pathologic findings with radiographic arterial flow to the liver (n=18; 15.7%); group B, those who developed CR (n=15; 13.0%); and group C, all others (n=82; 71.3%). Cholangiograms and histopathologic specimens were examined in a blinded fashion. RESULTS: Demographic factors were similar, except for age, with a significantly younger age and more episodes of rejection in groups A and B (P<0.03). Group A had a higher incidence of cytomegalovirus hepatitis (P=0.008). Five-year graft survivals for A, B, and C were 64.6%, 33.3%, and 76.1%, respectively (P=0.0001), 5-year patient survivals were 76.2%, 66.7%, and 89.1%, respectively (P=0.0001), and repeat transplantation rates were 27.8%, 46.7%, and 8.5%, respectively (P=0.005). Radiographically, 90% of cholangiograms in patients with recurrent disease showed at least multiple intrahepatic strictures. Histopathologically, patients with recurrent disease and CR shared many features. CONCLUSIONS: We have described a high incidence of recurrent PSC and CR in patients who received transplants for PSC. Histopathologic analysis suggests that CR and recurrent PSC could represent a spectrum of indistinguishable disease. However, the distinct difference in clinical outcome, as evidenced by an increased repeat transplantation rate and lower graft and patient survival in the CR group, clearly suggests that they are two distinct entities that require very different treatment strategies.


Asunto(s)
Colangitis Esclerosante/cirugía , Trasplante de Hígado , Adulto , Colangiografía , Colangitis Esclerosante/diagnóstico , Colangitis Esclerosante/etiología , Enfermedad Crónica , Grupos Diagnósticos Relacionados , Resistencia a Medicamentos , Femenino , Rechazo de Injerto/patología , Humanos , Trasplante de Hígado/diagnóstico por imagen , Trasplante de Hígado/inmunología , Trasplante de Hígado/patología , Masculino , Persona de Mediana Edad , Recurrencia , Reoperación , Esteroides/farmacología , Resultado del Tratamiento
3.
Am J Surg ; 176(3): 265-9, 1998 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-9776156

RESUMEN

BACKGROUND: Organ recipients are at risk for certain neoplasms. Ulcerative colitis (UC) is itself a strong risk factor for the development of colon carcinoma (CCa). Transplant patients with UC might be at higher risk for CCa. We analyzed these patients to compare the incidence and pattern of CCa development in these and non-UC patients following liver transplantation (OLTX). PATIENTS AND METHODS: Retrospective study of 1,085 OLTX patients. RESULTS: In 1,022 patients without UC, 1 patient (< 0.1%) developed adenocarcinoma in a colonic polyp 46 months after OLTX. Sixty-three of 108 (60%) patients undergoing OLTX simultaneously had UC. Five OLTX patients (8%) with UC developed colon adenocarcinoma 22 to 66 (mean 48) months after OLTX. Two have died. CONCLUSIONS: Coexistent UC in patients requiring OLTX constitutes a potentially high risk for the development of colonic cancer, a late-appearing event. These patients require close observation and frequent colonoscopic/histologic screening of the colon.


Asunto(s)
Adenocarcinoma/epidemiología , Neoplasias del Colon/epidemiología , Trasplante de Hígado , Complicaciones Posoperatorias/epidemiología , Adenocarcinoma/diagnóstico , Adolescente , Adulto , Anciano , Colangitis Esclerosante/complicaciones , Colangitis Esclerosante/cirugía , Colitis Ulcerosa/complicaciones , Colitis Ulcerosa/cirugía , Neoplasias del Colon/diagnóstico , Femenino , Estudios de Seguimiento , Humanos , Incidencia , Trasplante de Hígado/estadística & datos numéricos , Masculino , Persona de Mediana Edad , Complicaciones Posoperatorias/diagnóstico , Estudios Retrospectivos , Factores de Riesgo , Texas/epidemiología
4.
Transplantation ; 66(5): 598-601, 1998 Sep 15.
Artículo en Inglés | MEDLINE | ID: mdl-9753338

RESUMEN

BACKGROUND: Little is known about the value of intraoperative hepatic artery (HA) flow measurement on the development of HA complications in orthotopic liver transplantation (OLT). We undertook this study to see whether assessing HA flow at the OLT helps predict posttransplant HA complications (HA thrombosis or stenosis). METHODS: Four hundred and eleven consecutive OLT in 367 adult patients who received grafts between November 1992 and August 1995 were reviewed. Of these, 259 grafts in 255 patients with at least 1 year of follow-up and with complete data were studied. HA flow, portal vein flow, percentage of cardiac index going to HA (HA/CI), HA flow per 100 g of liver tissue, mean arterial pressure, central venous pressure, and CI were analyzed. Preservation injury was assessed by posttransplant alanine aminotransferase and aspartate aminotransferase levels. RESULTS: Thirty-four patients with 35 grafts developed HA thrombosis or stenosis during a median follow-up time of 29 months. HA complications occurring within the first 100 days of OLT were classified as early complications. HA flow at the time of surgery and percentage of CI going to the liver were found to be significant variables in early HA complications. Hepatic hemodynamics were not different in the late HA complication group compared to the control. Systemic hemodynamics and posttransplant alanine amino-transferase and aspartate aminotransferase levels were similar in all three groups. Logistic regression analysis showed that patients with HA flows less than 400 ml/min were more than 5 times as likely to develop HA complications (risk ratio 5.1). CONCLUSIONS: HA flow measurement should be obtained at the time of OLT and may help to predict early but not late posttransplant HA complications. Patients with HA flows less than 400 ml/min or HA/CI values of less than 7% may carry a higher risk for HA stenosis or thrombosis and may need close surveillance to detect such problems.


Asunto(s)
Arteriopatías Oclusivas/etiología , Arteria Hepática , Cuidados Intraoperatorios , Trasplante de Hígado/efectos adversos , Complicaciones Posoperatorias , Trombosis/etiología , Adulto , Hemorreología , Humanos , Flujo Sanguíneo Regional
5.
Transplantation ; 66(4): 529-32, 1998 Aug 27.
Artículo en Inglés | MEDLINE | ID: mdl-9734499

RESUMEN

BACKGROUND: With the poor results of resective and fenestration procedures for polycystic liver disease (PCLD), we present the first series of patients receiving orthotopic liver transplantation for this condition. METHODS: Five of our six patients with PCLD had polycystic kidney disease also. Three of these five received combined organ transplants, while the other two required subsequent kidney transplants. RESULTS: Forty-eight and 52 months after orthotopic liver transplantation, all surviving patients had relief of their pain, distention, and anorexia. Two patients had succumbed to infectious complications and died at 15 and 24 months after transplant. CONCLUSIONS: We conclude that patients with PCLD can be transplanted safely for the relief of their distention and anorexia, with good results. Those patients with both PCLD and polycystic kidney disease who are not dialysis dependent can be managed for several years with isolated liver transplantation and then receive kidney transplantation if needed. Those who are dialysis dependent should receive combined liver-kidney transplantation. Unfortunately, patients with polycystic disease seem to be very susceptible to infectious complications after organ transplantation.


Asunto(s)
Quistes/complicaciones , Quistes/cirugía , Trasplante de Riñón , Hepatopatías/complicaciones , Hepatopatías/cirugía , Trasplante de Hígado , Enfermedades Renales Poliquísticas/complicaciones , Enfermedades Renales Poliquísticas/cirugía , Adulto , Femenino , Humanos , Masculino , Persona de Mediana Edad
6.
J Surg Res ; 75(2): 116-26, 1998 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-9655084

RESUMEN

BACKGROUND: Cyclosporine A (CYA) is primarily utilized as an immunosuppressant, but its mechanisms of action (including decreased neutrophilic free radical production and stabilization of mitochondrial and lysosomal membranes) may have beneficial effects in ischemia and reperfusion (IR) injury. This study was undertaken to examine the effect of CYA pretreatment on porcine liver histopathologic changes and enzymatic release caused by ischemia and reperfusion. MATERIALS AND METHODS: CYA was administered orally for 4 days prior to surgery in two doses (10 or 20 mg/kg) while controls received only the control vehicle. Pigs were then exposed to 4 h of hepatic ischemia followed by 2 h of reperfusion. RESULTS: Significant decreases in AST levels compared to controls were seen in high dose CYA pigs at the end of ischemia and at 30-min intervals during the reperfusion period. Controls exhibited necrotic hepatocytes and severe inflammatory cell infiltration, while high dose CYA animals demonstrated mild inflammatory cell infiltrates. Controls had decreased survival--20% did not survive reperfusion. CONCLUSIONS: This study indicates that CYA may be useful in decreasing initial damage resulting from warm hepatic IR injury.


Asunto(s)
Ciclosporina/farmacología , Inmunosupresores/farmacología , Isquemia/enzimología , Isquemia/patología , Circulación Hepática/fisiología , Daño por Reperfusión/enzimología , Daño por Reperfusión/patología , Temperatura , Alanina Transaminasa/metabolismo , Animales , Aspartato Aminotransferasas/metabolismo , Relación Dosis-Respuesta a Droga , Arteria Hepática/efectos de los fármacos , Arteria Hepática/fisiopatología , Hígado/efectos de los fármacos , Hígado/enzimología , Hígado/patología , Circulación Hepática/efectos de los fármacos , Valores de Referencia , Flujo Sanguíneo Regional/efectos de los fármacos
7.
Clin Transplant ; 12(3): 263-9, 1998 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-9642521

RESUMEN

Patients awaiting liver transplantation may suffer from severe hyponatremia. It has been suggested that hyponatremia or its treatment might be associated with central pontine myelinolysis (CPM), a serious complication that can be seen after orthotopic liver transplantation (OLT). We undertook this study to assess the outcome of hyponatremic patients after OLT and to evaluate the risk factors in the development of CPM. A total of 379 adult OLT performed in 347 patients between March 1993 and December 1995 was studied using a prospectively-collected data base and retrospective chart review. The following risk factors for the development of CPM were analyzed: primary liver disease, nutritional status, alcoholism, diuretic use, hepatic encephalopathy, United Network for Organ Sharing (UNOS) status, preoperative serum sodium, magnesium and cholesterol levels, increase in serum sodium concentration during surgery, and immunosuppressive treatment. Overall 12 patients (3.5%) underwent OLT in a hyponatremic state (serum sodium < or = 127 meq/L). At a median follow-up of 14 months, 8 patients were alive without any neurological sequel. Six of the 12 patients developed neurological complications in the early post-operative period including CPM in 3, confusion in 2, and seizure in 1. The 3 patients who developed CPM expired within 3 months of OLT. The changes in serum sodium concentration during OLT in patients with and without CPM were 20.7 +/- 8.1 and 7.0 +/- 5.1 meq/L, respectively (p = 0.005). No other risk factor could be identified in the development of CPM. It is concluded that prognosis of hyponatremic patients after OLT is poor if they develop CPM. Slow correction of hyponatremia perioperatively may be critical in preventing this devastating complication.


Asunto(s)
Hiponatremia/complicaciones , Trasplante de Hígado/efectos adversos , Mielinólisis Pontino Central/etiología , Adulto , Anciano , Análisis de Varianza , Enfermedad Crónica , Femenino , Humanos , Hiponatremia/terapia , Imagen por Resonancia Magnética , Masculino , Persona de Mediana Edad , Mielinólisis Pontino Central/diagnóstico , Mielinólisis Pontino Central/patología , Pronóstico , Estudios Prospectivos , Estudios Retrospectivos , Factores de Riesgo , Resultado del Tratamiento
8.
Ann Thorac Surg ; 65(4): 1060-4, 1998 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-9564928

RESUMEN

BACKGROUND: Advances in surgical techniques and immunosuppressive drugs have improved the survival of patients after orthotopic liver transplantation. Enhanced survival has resulted in an increased number of patients who require medical as well as surgical management of diseases. METHODS: To contribute to the sparse literature on the surgical aspects, we reviewed our experience with 15 patients who underwent cardiac operation (1.25%) from a total of 1,200 liver transplant recipients at our center. The variables studied included the pretransplant cardiac evaluation, the interval from transplantation to cardiac operation, postoperative complications, the management of immunosuppression, and follow-up. The patients had a mean age of 52.9 years (range, 39 to 69 years) and 13 of them (86.6%) were men. Multiple cardiac risk factors were present in all 15 patients and chronic renal insufficiency was present in 7 patients. Cardiac operation was undertaken a mean of 30.4 months (range, 9 days to 62 months) after myocardial ischemia and valvular regurgitation had been ruled out at the time of transplantation. Myocardial revascularization was performed in 12 patients, 2 of whom underwent concurrent valve operation and 3 of whom underwent valve repair or replacement. Most patients had their immunosuppression regimen continued at baseline levels. RESULTS: There were no early deaths. Three patients had major complications and 4 had minor complications. There were no bleeding, infection, or healing complications. Postoperative renal parameters were persistently elevated in 5 patients and transiently elevated in 3. Liver function parameters were transiently elevated in 6 patients after the cardiac operation. No patient had hepatic rejection. A transient elevation or decrease in immunosuppressive drug levels was seen in 3 patients. Follow-up, obtained on all 15 patients, ranged from 6 to 83 months (mean, 26.5 months). There were 2 late deaths (13.3%), and 3 patients (25%) who underwent myocardial revascularization had recurrent angina. CONCLUSIONS: Cardiac operations can be undertaken safely in liver transplant recipients with good intermediate-term results. The immunosuppression regimen can be continued at preoperative levels with no need for stress-dose steroids. There were no hepatic complications among our patients, although some patients can experience worsening of renal failure.


Asunto(s)
Procedimientos Quirúrgicos Cardíacos , Trasplante de Hígado , Seguridad , Adulto , Anciano , Angina de Pecho/cirugía , Insuficiencia de la Válvula Aórtica/cirugía , Procedimientos Quirúrgicos Cardíacos/efectos adversos , Procedimientos Quirúrgicos Cardíacos/métodos , Puente de Arteria Coronaria , Femenino , Estudios de Seguimiento , Rechazo de Injerto/etiología , Implantación de Prótesis de Válvulas Cardíacas , Humanos , Terapia de Inmunosupresión , Inmunosupresores/uso terapéutico , Fallo Renal Crónico/complicaciones , Trasplante de Hígado/métodos , Masculino , Persona de Mediana Edad , Insuficiencia de la Válvula Mitral/cirugía , Isquemia Miocárdica/cirugía , Complicaciones Posoperatorias , Hemorragia Posoperatoria/etiología , Recurrencia , Factores de Riesgo , Infección de la Herida Quirúrgica/etiología , Tasa de Supervivencia , Factores de Tiempo , Cicatrización de Heridas
9.
Transplantation ; 65(7): 925-9, 1998 Apr 15.
Artículo en Inglés | MEDLINE | ID: mdl-9565096

RESUMEN

BACKGROUND: The use of hepatitis C serology-positive donors has become an option in patients affected by hepatitis C (Hep C) end-stage liver disease. Previous studies with less than 1 year of follow-up have suggested that there is no difference in early patient and graft survival. The aim of our review is to confirm with a longer follow-up (a minimum of 1 year) that the use of these organs is safe and that patient and graft survival are comparable to those of patients with Hep C who received Hep C-negative grafts. METHODS: Between 1985 and 1995, 213 patients were transplanted with a diagnosis of Hep C. Seventy-six patients were excluded from the study, 47 for insufficient follow-up and 29 because the diagnosis of recurrence was not certain. Twenty-two patients received Hep C+ donor grafts and 115 patients received Hep C-donor grafts. These two groups were evaluated to assess the rate and severity of recurrence by serial biopsies and to assess patient and graft survival. RESULTS: Recurrent Hep C was documented by biopsy in 12 of 22 patients who received Hep C+ donor grafts. Of these 12 patients, 9 had mild chronic hepatitis, 2 had fibrosis, and 1 had cirrhosis. Ten of the 22 patients had normal biopsies. Of the patients who received Hep C- grafts, 48 of 115 had recurrent disease. Of these 48 patients, 23 had mild chronic hepatitis, 15 had fibrosis, and 10 had cirrhosis. Sixty-seven of 115 had normal biopsies. The recurrence rate was 54.55% in the Hep C+ donor grafts and 41.74% in the Hep C- donor grafts (P=NS). Patient and graft survival at 4 years after transplant were 83.9% and 71.9% in the Hep C+ donor grafts and 79.1% and 76.2% in the Hep C- donor grafts, respectively (P=NS). CONCLUSIONS: Our study suggests that Hep C+ donors can be used with excellent long-term results and that the progression of the recurrent disease does not seem to be affected by the pre-existence of the Hep C virus in the donor.


Asunto(s)
Hepacivirus , Hepatitis C/virología , Trasplante de Hígado , Adolescente , Adulto , Anciano , Biopsia , Progresión de la Enfermedad , Femenino , Estudios de Seguimiento , Supervivencia de Injerto , Hepatitis C/patología , Humanos , Hígado/patología , Hígado/virología , Masculino , Persona de Mediana Edad , Resultado del Tratamiento
10.
Ann Surg ; 227(4): 590-9, 1998 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-9563551

RESUMEN

OBJECTIVE: The first purpose of this study is to identify the types and incidences of surgical procedures in patients who have previously undergone liver transplantation, with particular focus on the complication rates and the lengths of hospital stay. The second purpose is to present the management guidelines for patients with liver transplants at the preoperative, intraoperative, and postoperative stages of surgical procedure. SUMMARY BACKGROUND DATA: The surgical literature on this issue is scant, and with the growing liver transplant patient population it is not unlikey for any surgery specialist to have to operate on a patient who has undergone liver transplantation. METHODS: A sample of 409 patients with available hospital records, with a minimum of a 2-year follow-up, and with telephone access for interviews was chosen. Type of surgery, time from the liver transplant, hospital stay, immunosuppressive regimen, and complications were recorded. RESULTS: A large proportion of patients (24.2%) underwent some type of surgical procedure 2 to 10 years after liver transplantation. The authors demonstrate that most of the elective procedures can be safely carried out without an increased incidence of complication and without longer hospital stay than the general population. Conversely, emergent procedures are plagued by a greater incidence of complications that not only affect the function of the liver graft but may risk the life of the patient.


Asunto(s)
Procedimientos Quirúrgicos Electivos , Trasplante de Hígado , Anastomosis en-Y de Roux , Artroplastia de Reemplazo de Cadera , Enfermedades del Sistema Digestivo/cirugía , Humanos , Inmunosupresores/uso terapéutico , Tiempo de Internación , Complicaciones Posoperatorias , Periodo Posoperatorio , Guías de Práctica Clínica como Asunto , Estudios Retrospectivos , Mallas Quirúrgicas
11.
Liver Transpl Surg ; 4(2): 119-27, 1998 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-9516563

RESUMEN

New-onset hepatitis B (de novo B) after liver transplantation (OLTX) is an emerging concern. The goals of our study were to determine the incidence and pattern of this infection, to attempt determination of risk factors and the role of immunosuppression, and to review its morbidity/mortality. Over a 10-year period, 1078 OLTX were performed in 956 patients at our institution. Eight hundred twenty-six patients had proven negative hepatitis B surface antigen (HBsAg) before transplantation. Among these, 14 patients (1.7%), 8 women and 6 men, ages 21-59 years (median, 42 years), developed positive HBsAg after transplantation and were defined as de novo B. In 10 of 14 patients (71%), positive HBsAg was revealed during routine annual visits, whereas 4 patients had titer verification prompted by illness. Blood product use (cryoprecipitate, fresh-frozen plasma, platelets, and packed red blood cells) during the transplant hospitalization was similar between groups. Pretransplant hepatitis C infection was more prevalent among the 14 patients with de-novo B (7 of 14, 50% v 129 of 812, 16%; P < or = 05). Hepatitis B vaccine had been given to 12 patients (86%) (but not given to 2) who developed de novo B. Incidence and severity of rejection were similar in both populations, although de novo B patients had more late rejections. Our use of immunosuppressive protocols was the same in both groups. Mean follow-up of the infected patients is 24 (5-51) months. Twelve of these 14 de novo B patients were not clinically ill, with normal or near-normal transaminase levels. One of 14 has died from complications related to hepatic artery revascularization, and another is well after repeat OLTX for biliary strictures. Half of these de novo B patients remain free from viral antigens in their transplanted liver tissue. The high percentage of positive hepatitis C patients who acquire de novo B may indicate a link between these two viral infections and potential risk factor for de novo B. The origins of this infection are most likely multifactorial, needing further study. De novo B after liver transplantation is preliminarily associated with little clinical morbidity and mortality.


Asunto(s)
Hepatitis B/epidemiología , Hepatitis B/etiología , Trasplante de Hígado , Adulto , Femenino , Rechazo de Injerto/tratamiento farmacológico , Rechazo de Injerto/epidemiología , Hepatitis B/inmunología , Hepatitis B/prevención & control , Antígenos del Núcleo de la Hepatitis B/sangre , Antígenos de Superficie de la Hepatitis B/sangre , Vacunas contra Hepatitis B , Virus de la Hepatitis B/aislamiento & purificación , Humanos , Inmunosupresores/uso terapéutico , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Factores de Riesgo , Tasa de Supervivencia
12.
Physiol Behav ; 62(3): 525-9, 1997 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-9272659

RESUMEN

Afferent nerves of the liver have been suggested to have a major influence on feeding behavior. Nevertheless, total liver denervations (TLD) in rats, that were verified by histofluorescence technique, did not change short or long term meal patterns. However, these studies have been criticized that the TLD procedures may have missed some liver innervation. In the present study meal patterns were conducted prior to and following liver transplantation in rats using a transplant procedure with arterialization. The transplanted rats recovered their pre-operative body weight in 7.5 +/- 0.6 days and meal pattern analysis was conducted two days later. In comparison with pre-surgery there was no differences in 24 h food intake (gms); dark phase: intake (gms), meal size (gms), meal duration (min), inter-meal interval (min), and frequency; and light phase: intake (gms), meal size (gms), meal duration (min), inter-meal interval (min), and frequency. These data, like earlier work in TLD rats showing that the animals consumed normal meals (when offered a variety of diets), starting with the first meal post-surgery, question the importance of liver afferents in the control of feeding behavior.


Asunto(s)
Ingestión de Alimentos/fisiología , Trasplante de Hígado/fisiología , Animales , Masculino , Ratas , Factores de Tiempo
13.
Surgery ; 121(5): 520-5, 1997 May.
Artículo en Inglés | MEDLINE | ID: mdl-9142150

RESUMEN

BACKGROUND: Although pentoxifylline has been shown to improve tissue oxygenation and restore hepatocellular function after hemorrhagic shock, its effect on hepatic ischemia and reperfusion injury has not been fully clarified. The purpose of this study was to determine whether pentoxifylline exerted beneficial effects on liver histopathologic changes and enzymatic release caused by ischemia and reperfusion. METHODS: Warm, reversible hepatic ischemia/reperfusion injury was induced in four groups of pigs. Preoperative oral (24 mg/kg or 50 mg/kg) or intraoperative intravenous (50 mg/kg) pentoxifylline was administered. Control animals received intravenous normal saline solution. RESULTS: Untreated control animals exhibited significant liver damage expressed by hepatic histopathologic changes and high plasma levels of aminotransferases. Decreased animal survival was seen in the untreated group. All treated animals survived. Pentoxifylline given orally did not improve histopathologic changes or enzyme release. Intravenous administration caused significant amelioration of liver tissue damage, marked reduction of aspartate aminotransferase levels, and mild attenuation of alanine aminotransferase levels, as compared with control. CONCLUSIONS: This study indicates that intraoperative, intravenous pentoxifylline reduces hepatic injury after warm ischemia and reperfusion.


Asunto(s)
Isquemia/tratamiento farmacológico , Hígado/irrigación sanguínea , Pentoxifilina/uso terapéutico , Daño por Reperfusión/tratamiento farmacológico , Vasodilatadores/uso terapéutico , Administración Oral , Animales , Inyecciones Intravenosas , Circulación Hepática/efectos de los fármacos , Porcinos
15.
Transplantation ; 63(2): 250-5, 1997 Jan 27.
Artículo en Inglés | MEDLINE | ID: mdl-9020326

RESUMEN

Little is known about hepatic artery (HA) patency and patient clinical course when the nonthrombosed HA has been revised. We undertook this study to evaluate the risk factors in the development of HA stenosis and to assess the impact of HA revision on the outcome. A total of 857 adult consecutive OLT in 780 patients performed over a 6-year period were studied. Patients who underwent revision of their nonthrombosed but stenotic HA were reviewed for patient/graft survival, method of HA revision, incidence of biliary strictures, and long-term HA patency. Overall 39 patients (5%) with 41 allografts underwent HA revision for stenosis. Median time to diagnosis was 100 days posttransplant (range 1-1220 days). HA flow at the time of OLT was found to be the only significant variable of an anastomotic stenosis. No risk factor could be identified for the graft HA stenosis. Treatment methods included resection of the stenotic segment with primary reanastomosis (n = 17), aortohepatic iliac artery graft (n = 11), interposition vein graft (n = 4), vein patch angioplasty (n = 2), interposition artery graft (n = 1), and percutaneous transluminal balloon angioplasty (n = 6). Postrevisional HA patency was demonstrated in 32 (78%) cases. At a median follow-up of 25 months, 26 patients (67%) were asymptomatic with good liver function. Nine patients had developed biliary strictures. Seven patients had undergone retransplantation and 8 patients had died. The actuarial patient and graft survivals at 4 years in the patients with revised HA were 65% and 56%, respectively. HA stenosis requiring revision is an infrequent occurrence after OLT. Long-term patency of the revised HA is good. Revision of the HA may help prevent biliary strictures and allow for good long-term graft function in the majority of patients.


Asunto(s)
Arteriopatías Oclusivas/epidemiología , Arteria Hepática , Trasplante de Hígado , Complicaciones Posoperatorias , Adulto , Anastomosis Quirúrgica , Angiografía , Angioplastia de Balón , Arteriopatías Oclusivas/diagnóstico , Arteriopatías Oclusivas/terapia , Femenino , Estudios de Seguimiento , Rechazo de Injerto , Arteria Hepática/cirugía , Humanos , Incidencia , Trasplante de Hígado/métodos , Masculino , Persona de Mediana Edad , Recurrencia , Reoperación , Estudios Retrospectivos , Factores de Riesgo , Factores de Tiempo , Resultado del Tratamiento , Ultrasonografía Doppler Dúplex
16.
Transplantation ; 64(12): 1760-5, 1997 Dec 27.
Artículo en Inglés | MEDLINE | ID: mdl-9422417

RESUMEN

BACKGROUND: As many as 38% of combined liver-kidney transplant (LKTx) procedures performed nationally may be done for the renal diagnosis of hepatorenal syndrome (HRS). This study was designed to compare the national results with those at our medical center and to determine if combined LKTx provides any benefit over isolated liver transplant (LTx) to HRS patients. METHODS: Data on 29 combined LKTx and 79 HRS patients at our center were collected and compared with the national data on 414 LKTx and 2442 patients with serum creatinine >2.0 mg/dl receiving isolated LTx from 1988 to 1995. RESULTS: United Network of Organ Sharing data revealed 5-year patient survival of 62.2% for LKTx recipients and 50.4% for patients with serum creatinine >2.0 mg/dl receiving isolated LTx (P=0.0001). Our center results demonstrated 5-year patient survival of 48.1% for LKTx patients, 67.1% for HRS patients receiving isolated LTx, and 70.1% for patients with serum creatinine >2.0 mg/dl receiving isolated LTx (P not significant comparing all groups). Intensive care unit status and preoperative dialysis rates were similar in those HRS patients who did and those who did not need future KTx. CONCLUSION: National data would suggest a survival benefit of combined LKTx over isolated LTx for those patients with poor renal function, specifically those with HRS, whereas our center's results suggest otherwise. Unfortunately, we could not identify any preoperative risk factors in the HRS patients, or in the broader group of patients with renal insufficiency at our center, that would indicate the need for future renal transplantation. We believe that HRS patients can be successfully managed with isolated LTx.


Asunto(s)
Síndrome Hepatorrenal/cirugía , Trasplante de Riñón/métodos , Trasplante de Hígado/métodos , Humanos , Enfermedades Renales/cirugía , Trasplante de Riñón/estadística & datos numéricos , Trasplante de Hígado/estadística & datos numéricos , Análisis de Supervivencia
17.
Transplantation ; 64(12): 1801-7, 1997 Dec 27.
Artículo en Inglés | MEDLINE | ID: mdl-9422423

RESUMEN

BACKGROUND: We undertook this study to understand the causes of late graft loss and long-term outcome in orthotopic liver transplantation (OLT) recipients. METHODS: Prospectively collected data of 1174 consecutive OLT in 1045 adult patients who received liver grafts between April 1985 and August 1995 were reviewed. The causes of graft loss, pretransplant patient characteristics, and posttransplant events were analyzed in patients who survived at least 1 year after OLT, in an attempt to establish a link between these factors and graft loss. RESULTS: One hundred fifty-nine (17.9%) grafts were lost after the first year. Of these, 132 grafts were lost by death and 27 by retransplantation. Recipients who survived the first year (n=884) had 5- and 10-year survivals of 81.4% and 67.2%, respectively. Death with a functioning graft occurred in 97 (61%) patients. The main causes of late graft loss were recurrent disease (n=48), cardiovascular and cerebral vascular accidents (n=28), infections (n=24), and chronic rejection (n = 15). Pretransplant heart disease and diabetes were found to be significant risk factors for late graft loss due to cardiovascular diseases and cerebral vascular accidents. CONCLUSIONS: Survival of OLT patients who live beyond the first posttransplant year is excellent. Some patient characteristics may be associated with late graft loss. Compared with previous reports, this study shows an increased incidence of late graft loss secondary to recurrent diseases, de novo malignancies, cardiovascular diseases, and cerebral vascular accidents. Chronic rejection seems to be a less frequent cause of late graft loss. The prevention of recurrent disease and better immunosuppression may further improve these results.


Asunto(s)
Supervivencia de Injerto , Trasplante de Hígado , Adolescente , Adulto , Anciano , Enfermedades Cardiovasculares/complicaciones , Trastornos Cerebrovasculares/complicaciones , Enfermedades Transmisibles/complicaciones , Femenino , Humanos , Hepatopatías/cirugía , Masculino , Persona de Mediana Edad , Estudios Prospectivos , Riesgo , Análisis de Supervivencia , Factores de Tiempo
18.
Transplantation ; 62(12): 1784-7, 1996 Dec 27.
Artículo en Inglés | MEDLINE | ID: mdl-8990363

RESUMEN

BACKGROUND: Gender is currently not a criterion in the allocation of scarce donor organs. The purpose of this study was to determine the effects of gender on patient and graft survival, incidence of rejection, and postoperative complications after orthotopic liver transplantation. METHODS: During a 10-year period, 1138 liver transplants were performed on 1010 adult patients at Baylor University Medical Center. In this study, 994 patients with at least 6 months of posttransplant follow-up were reviewed. The four combinations of gender match and mismatch included: group 1, donor female to recipient female (n=229); group 2, donor female to recipient male (n= 126); group 3, donor male to recipient female (n=247); and group 4, donor male to recipient male (n=392). These groups were evaluated for patient survival, graft survival, episodes of rejection, incidence of chronic rejection, and postoperative complications. RESULTS: All groups were similar with respect to recipient age, underlying medical condition, incidence of bacterial and viral infections, postoperative biliary complications, and the incidence of chronic rejection. Female recipients had the highest incidence of early rejection (0-6 months, 70%) compared with male recipients (60%, P<0.039). Postoperative vascular complication (10%) was highest in group 3 (P<0.01). The two-year graft survival rate for groups 1, 3, and 4 was 76.2%, 75.6%, and 73.5%, respectively. Group 2, donor female to recipient male, had a 2-year graft survival rate of 55.9% (P<0.0001). This finding is not explained by the incidence of early rejection. Chronic rejection does not appear to be contributory. The mean donor age for groups 1, 3, and 4 was 35.7, 25.8, and 30.4 years, respectively. The mean donor age for group 2 was slightly older, at 41.6 years (P<0.0001). This difference, while statistically significant, is of unknown clinical relevance. A multivariate analysis controlling for donor age confirmed the decreased graft and patient survival rates in the donor female to recipient male group. CONCLUSIONS: The decreased graft survival rate in male recipients of female livers warrants further study and may argue for modifying the current management of adult male liver transplant recipients.


Asunto(s)
Trasplante de Hígado/fisiología , Soluciones Preservantes de Órganos , Caracteres Sexuales , Donantes de Tejidos , Adenosina , Adulto , Alopurinol , Infecciones Bacterianas/epidemiología , Enfermedades de las Vías Biliares/etiología , Femenino , Identidad de Género , Glutatión , Rechazo de Injerto , Supervivencia de Injerto , Estado de Salud , Humanos , Soluciones Hipertónicas , Incidencia , Insulina , Hepatopatías/etiología , Hepatopatías/fisiopatología , Trasplante de Hígado/inmunología , Trasplante de Hígado/mortalidad , Trastornos Linfoproliferativos/etiología , Masculino , Preservación de Órganos/métodos , Grupos Raciales , Rafinosa , Tasa de Supervivencia , Resultado del Tratamiento , Virosis/epidemiología
20.
Transplantation ; 62(8): 1060-3, 1996 Oct 27.
Artículo en Inglés | MEDLINE | ID: mdl-8900301

RESUMEN

Due to the significant increase in the number of patients with alcoholic liver cirrhosis being referred for liver transplantation, studies to determine recidivism rates and influential factors affecting those rates have become increasingly crucial. Between 12/85 and 12/91, 67 patients diagnosed with alcohol related end-stage liver disease underwent orthotopic liver transplantation at Baylor University Medical Center. A 3-8 year follow-up study was conducted wherein surviving patients were contacted by phone to evaluate subsequent alcohol consumption following transplantation (with the exception of two patients whose primary physicians were contacted). Of the 67 patients transplanted, 18 had expired, 7 were alive but unavailable, and 1 had been lost to follow-up. Of the remaining 41 patients interviewed, 21 had remained abstinent, while the other 20 had returned to some form of drinking. Of patients with less than 6 months of pretransplant abstinence, only 30% remained abstinent, while the other 70% had resumed drinking. Regarding patients with at least 6 months of pretransplant abstinence, 58% had remained abstinent, while the other 42% had resumed drinking. In both groups, nearly 1/3 of those who had admitted to posttransplant drinking reported themselves as again abstinent and recommitted to sobriety when interviewed. In conclusion, 49% of patients interviewed had resumed some type of drinking following transplantation-- however, this appears not to have affected compliance or survival potential. Only 2 (4.8%) of the 41 patients interviewed had returned to excessive drinking. Thus, our findings support the use of orthotopic liver transplantation for patients with alcohol related end-stage liver disease.


Asunto(s)
Consumo de Bebidas Alcohólicas , Cirrosis Hepática Alcohólica/cirugía , Trasplante de Hígado , Adulto , Anciano , Femenino , Humanos , Trasplante de Hígado/mortalidad , Masculino , Persona de Mediana Edad , Cooperación del Paciente , Estudios Retrospectivos , Análisis de Supervivencia
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